Property insurance provides protection against most risks to property, such as fire, theft and some weather damage. This includes specialized forms of insurance such as fire insurance, flood insurance, earthquake insurance, home insurance or boiler insurance. Property is insured in two main ways - open perils and named perils. Open perils cover all the causes of loss not specifically excluded in the policy. Common exclusions on open peril policies include damage resulting from earthquakes, floods, nuclear incidents, acts of terrorism and war. Named perils require the actual cause of loss to be listed in the policy for insurance to be provided. The more common named perils include such damage-causing events as fire, lightning, explosion and theft.

Home insurance, also commonly called hazard insurance or homeowners insurance (often abbreviated in the real estate industry as HOI), is the type of property insurance that covers private homes. It is an insurance policy that combines various personal insurance protections, which can include losses occurring to one's home, its contents, loss of its use (additional living expenses), or loss of other personal possessions of the homeowner, as well as liability insurance for accidents that may happen at the home. It requires that at least one of the named insured occupies the home. The dwelling policy (DP) is similar, but used for residences which don't qualify for various reasons, such as vacancy/non-occupancy, seasonal/secondary residence, or age. It is a multiple line insurance, meaning that it includes both property and liability coverage, with an indivisible premium, meaning that a single premium is paid for all risks. Standard forms divide coverage into several categories, and the coverage provided is typically a percentage of Coverage A, which is coverage for the main dwelling.

The cost of homeowners insurance often depends on what it would cost to replace the house and which additional riders—additional items to be insured—are attached to the policy. The insurance policy itself is a lengthy contract, and names what will and what will not be paid in the case of various events. Typically, claims due to floods, or war (whose definition typically includes a nuclear explosion from any source) are excluded. Special insurance can be purchased for these possibilities, including flood insurance. Insurance must be updated to the present and existing value at whatever inflation up or down, and an appraisal paid by the insurance company will be added on to the policy premium. Fire insurance will require a special premium charge, plus the addition of smoke detectors and on site fire suppression systems to qualify.

The home insurance policy is usually a term contract—a contract that is in effect for a fixed period of time. The payment the insured makes to the insurer is called the premium. The insured must pay the insurer the premium each term. Most insurers charge a lower premium if it appears less likely the home will be damaged or destroyed: for example, if the house is situated next to a fire station, if the house is equipped with fire sprinklers and fire alarms. Perpetual insurance, which is a type of home insurance without a fixed term, can also be obtained in certain areas.

In the United States, most home buyers borrow money in the form of a mortgage loan, and the mortgage lender always requires that the buyer purchase homeowners insurance as a condition of the loan, in order to protect the bank if the home were to be destroyed. Anyone with an insurable interest in the property should be listed on the policy. In some cases the mortgagee will waive the need for the mortgagor to carry homeowner's insurance if the value of the land exceeds the amount of the mortgage balance. In a case like this even the total destruction of any buildings would not affect the ability of the lender to be able to foreclose and recover the full amount of the loan.

There are three types of insurance coverage. Replacement cost pays the cost of replacing your property regardless of depreciation or appreciation. Extended replacement cost will pay over the coverage limit if the costs for construction have increased. This generally will not exceed 20% of the limit. Actual Cash Value provides replacement minus depreciation. When you obtain an insurance policy, the coverage limit established is the maximum amount the insurance company will pay out in case of loss of property.[citation needed] This amount will need to fluctuate if homes in your neighborhood are rising; the amount needs to be in step with the actual value of your home. In case of a fire, household content replacement is tabulated as a percentage of the value of the home. In case of high value items, the insurance company may ask to specifically cover these items separate from the other household contents. One last coverage option is to have alternative living arrangements included in a policy.[citation needed] If a fire leaves your home uninhabitable, the policy can help pay for a hotel or other living arrangements.

Nationwide, only 20% of American homes at risk for floods are covered by flood insurance. Private insurers are unable to insure against the peril of flood due to the prevalence of adverse selection, which is the purchase of insurance by persons most affected by the specific peril of flood. In traditional insurance, insurers use the economic law of large numbers to charge a relatively small fee to large numbers of people in order to pay the claims of the small numbers of claimants who have suffered a loss. Unfortunately, in flood insurance, the numbers of claimants is larger than the available number of persons interested in protecting their property from the peril, which means that insurers are unable to cover their costs in flood insurance.

In certain flood-prone areas, the Federal Government requires flood insurance to secure mortgage loans backed by federal agencies such as the FHA and VA. However, the program has never worked as insurance, because of adverse selection. It has never priced people out of living in very risky areas by charging an appropriate premium, instead, too few places are included in the must-insure category, and premiums are artificially low." The lack of flood insurance can be detrimental to many homeowners who may discover only after the damage has been done that their standard insurance policies do not cover flooding.

Flooding is defined by the National Flood Insurance Program as a general and temporary condition of partial or complete inundation of two or more acres of normally dry land area or two or more properties (at least one of which is your property from: Overflow of inland waters, unusual and rapid accumulation or runoff of surface waters from ANY SOURCE, and mudflows.

This can be brought on by landslides, a hurricane, earthquakes, or other natural disasters that influence flooding, but while a homeowner may, for example, have earthquake coverage, that coverage may not cover floods as a result of earthquakes.